{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "state": "PUBLISHED",
        "cveId": "CVE-2021-23758",
        "assignerOrgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730",
        "assignerShortName": "snyk",
        "dateUpdated": "2026-08-27T03:56:43.403Z",
        "dateReserved": "2021-01-08T00:00:00.000Z",
        "datePublished": "2021-12-03T20:05:12.932Z"
    },
    "containers": {
        "cna": {
            "title": "Deserialization of Untrusted Data",
            "datePublic": "2021-12-03T00:00:00.000Z",
            "providerMetadata": {
                "orgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730",
                "shortName": "snyk",
                "dateUpdated": "2023-11-14T03:06:35.776Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "All versions of package ajaxpro.2 are vulnerable to Deserialization of Untrusted Data due to the possibility of deserialization of arbitrary .NET classes, which can be abused to gain remote code execution."
                }
            ],
            "affected": [
                {
                    "vendor": "n/a",
                    "product": "AjaxPro.2",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "unspecified",
                            "versionType": "custom"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://snyk.io/vuln/SNYK-DOTNET-AJAXPRO2-1925971"
                },
                {
                    "url": "https://github.com/michaelschwarz/Ajax.NET-Professional/commit/b0e63be5f0bb20dfce507cb8a1a9568f6e73de57"
                },
                {
                    "url": "http://packetstormsecurity.com/files/175677/AjaxPro-Deserialization-Remote-Code-Execution.html"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Hans-Martin Münch (MOGWAI LABS)"
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "attackVector": "NETWORK",
                        "attackComplexity": "HIGH",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "scope": "UNCHANGED",
                        "confidentialityImpact": "HIGH",
                        "integrityImpact": "HIGH",
                        "availabilityImpact": "HIGH",
                        "baseScore": 8.1,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "text",
                            "lang": "en",
                            "description": "Deserialization of Untrusted Data"
                        }
                    ]
                }
            ]
        },
        "adp": [
            {
                "providerMetadata": {
                    "orgId": "af854a3a-2127-422b-91ae-364da2661108",
                    "shortName": "CVE",
                    "dateUpdated": "2024-08-03T19:14:09.129Z"
                },
                "title": "CVE Program Container",
                "references": [
                    {
                        "url": "https://snyk.io/vuln/SNYK-DOTNET-AJAXPRO2-1925971",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "https://github.com/michaelschwarz/Ajax.NET-Professional/commit/b0e63be5f0bb20dfce507cb8a1a9568f6e73de57",
                        "tags": [
                            "x_transferred"
                        ]
                    },
                    {
                        "url": "http://packetstormsecurity.com/files/175677/AjaxPro-Deserialization-Remote-Code-Execution.html",
                        "tags": [
                            "x_transferred"
                        ]
                    }
                ]
            },
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-08-26T00:00:00+00:00",
                                "options": [
                                    {
                                        "Exploitation": "active"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3",
                                "id": "CVE-2021-23758"
                            }
                        }
                    },
                    {
                        "other": {
                            "type": "kev",
                            "content": {
                                "dateAdded": "2026-08-26",
                                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-23758"
                            }
                        }
                    }
                ],
                "references": [
                    {
                        "url": "https://blog.talosintelligence.com/uat-10147-chinese-speaking-adversary-integrates-agentic-ai-into-post-compromise-operations/",
                        "tags": [
                            "third-party-advisory"
                        ]
                    },
                    {
                        "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-23758",
                        "tags": [
                            "government-resource"
                        ]
                    }
                ],
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "lang": "en",
                                "type": "CWE",
                                "cweId": "CWE-502",
                                "description": "CWE-502 Deserialization of Untrusted Data"
                            }
                        ]
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-08-27T03:56:43.403Z"
                },
                "timeline": [
                    {
                        "time": "2026-08-26T00:00:00.000Z",
                        "lang": "en",
                        "value": "CVE-2021-23758 added to CISA KEV"
                    }
                ]
            }
        ]
    }
}